Copyright © 2012 The McGraw-Hill Companies, Inc. All rights reserved.McGraw-Hill
Chapter 08: Secondary StorageChapter 08: ...
Copyright © 2012 The McGraw-Hill Companies, Inc. All rights reserved.
ComputingEssentials2012:ComputingEssentials2012:Maki...
Copyright © 2012 The McGraw-Hill Companies, Inc. All rights reserved.
ComputingEssentials2012:ComputingEssentials2012:Maki...
Copyright © 2012 The McGraw-Hill Companies, Inc. All rights reserved.
ComputingEssentials2012:ComputingEssentials2012:Maki...
Copyright © 2012 The McGraw-Hill Companies, Inc. All rights reserved.
ComputingEssentials2012:ComputingEssentials2012:Maki...
Copyright © 2012 The McGraw-Hill Companies, Inc. All rights reserved.
ComputingEssentials2012:ComputingEssentials2012:Maki...
Copyright © 2012 The McGraw-Hill Companies, Inc. All rights reserved.
ComputingEssentials2012:ComputingEssentials2012:Maki...
Copyright © 2012 The McGraw-Hill Companies, Inc. All rights reserved.
ComputingEssentials2012:ComputingEssentials2012:Maki...
Copyright © 2012 The McGraw-Hill Companies, Inc. All rights reserved.
ComputingEssentials2012:ComputingEssentials2012:Maki...
Copyright © 2012 The McGraw-Hill Companies, Inc. All rights reserved.
ComputingEssentials2012:ComputingEssentials2012:Maki...
Copyright © 2012 The McGraw-Hill Companies, Inc. All rights reserved.
ComputingEssentials2012:ComputingEssentials2012:Maki...
Copyright © 2012 The McGraw-Hill Companies, Inc. All rights reserved.
ComputingEssentials2012:ComputingEssentials2012:Maki...
Copyright © 2012 The McGraw-Hill Companies, Inc. All rights reserved.
ComputingEssentials2012:ComputingEssentials2012:Maki...
Copyright © 2012 The McGraw-Hill Companies, Inc. All rights reserved.
ComputingEssentials2012:ComputingEssentials2012:Maki...
Copyright © 2012 The McGraw-Hill Companies, Inc. All rights reserved.
ComputingEssentials2012:ComputingEssentials2012:Maki...
Copyright © 2012 The McGraw-Hill Companies, Inc. All rights reserved.
ComputingEssentials2012:ComputingEssentials2012:Maki...
Copyright © 2012 The McGraw-Hill Companies, Inc. All rights reserved.
ComputingEssentials2012:ComputingEssentials2012:Maki...
Copyright © 2012 The McGraw-Hill Companies, Inc. All rights reserved.
ComputingEssentials2012:ComputingEssentials2012:Maki...
Copyright © 2012 The McGraw-Hill Companies, Inc. All rights reserved.
ComputingEssentials2012:ComputingEssentials2012:Maki...
Copyright © 2012 The McGraw-Hill Companies, Inc. All rights reserved.
ComputingEssentials2012:ComputingEssentials2012:Maki...
Copyright © 2012 The McGraw-Hill Companies, Inc. All rights reserved.
ComputingEssentials2012:ComputingEssentials2012:Maki...
Copyright © 2012 The McGraw-Hill Companies, Inc. All rights reserved.
ComputingEssentials2012:ComputingEssentials2012:Maki...
Copyright © 2012 The McGraw-Hill Companies, Inc. All rights reserved.
ComputingEssentials2012:ComputingEssentials2012:Maki...
Copyright © 2012 The McGraw-Hill Companies, Inc. All rights reserved.
ComputingEssentials2012:ComputingEssentials2012:Maki...
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O leary2012 comp_ppt_ch08

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O leary2012 comp_ppt_ch08

  1. 1. Copyright © 2012 The McGraw-Hill Companies, Inc. All rights reserved.McGraw-Hill Chapter 08: Secondary StorageChapter 08: Secondary StorageChapter 08: Secondary StorageChapter 08: Secondary Storage
  2. 2. Copyright © 2012 The McGraw-Hill Companies, Inc. All rights reserved. ComputingEssentials2012:ComputingEssentials2012:MakingITWorkforYouMakingITWorkforYou 8-2McGraw-Hill CompetenciesCompetencies (Page 1 of 2)(Page 1 of 2) • Distinguish betweenDistinguish between primaryprimary andand secondary storagesecondary storage • Discuss the important characteristics of secondaryDiscuss the important characteristics of secondary storage, including media, capacity, storage devices, andstorage, including media, capacity, storage devices, and access speedaccess speed • DescribeDescribe hard disk plattershard disk platters,, trackstracks,, sectorssectors, and, and headhead crashescrashes • CompareCompare internalinternal andand external hard drivesexternal hard drives • Discuss performance enhancements includingDiscuss performance enhancements including disk cachingdisk caching,, RAIDsRAIDs,, file compressionfile compression, and, and file decompressionfile decompression
  3. 3. Copyright © 2012 The McGraw-Hill Companies, Inc. All rights reserved. ComputingEssentials2012:ComputingEssentials2012:MakingITWorkforYouMakingITWorkforYou 8-3McGraw-Hill CompetenciesCompetencies (Page 2 of 2)(Page 2 of 2) • Define optical storage includingDefine optical storage including compactcompact,, digital versatiledigital versatile,, andand high-definition discshigh-definition discs • Define solid-state storage, includingDefine solid-state storage, including solid-state drivessolid-state drives,, flash memoryflash memory, and, and USB drivesUSB drives • DefineDefine cloud storagecloud storage andand cloud storage servicescloud storage services • Discuss mass storage devices, enterprise storage systems,Discuss mass storage devices, enterprise storage systems, andand storage area networksstorage area networks
  4. 4. Copyright © 2012 The McGraw-Hill Companies, Inc. All rights reserved. ComputingEssentials2012:ComputingEssentials2012:MakingITWorkforYouMakingITWorkforYou 8-4McGraw-Hill IntroductionIntroduction • Data storage has expanded from text and numericData storage has expanded from text and numeric files to include digital music files, photographicfiles to include digital music files, photographic files, video files, and much more.files, video files, and much more. • These new types of files require secondary storageThese new types of files require secondary storage devices with much greater capacity.devices with much greater capacity. • In this chapter, you learn aboutIn this chapter, you learn about the many types of secondarythe many types of secondary storage devices including theirstorage devices including their capabilities and limitations.capabilities and limitations.
  5. 5. Copyright © 2012 The McGraw-Hill Companies, Inc. All rights reserved. ComputingEssentials2012:ComputingEssentials2012:MakingITWorkforYouMakingITWorkforYou 8-5McGraw-Hill StorageStorage • Primary storagePrimary storage – Volatile storageVolatile storage – Temporary storageTemporary storage – Random AccessRandom Access Memory (RAM)Memory (RAM) • Secondary storageSecondary storage – Nonvolatile storageNonvolatile storage – Permanent storagePermanent storage • Secondary storageSecondary storage characteristicscharacteristics – MediaMedia – CapacityCapacity – Storage devicesStorage devices – Access speedAccess speed
  6. 6. Copyright © 2012 The McGraw-Hill Companies, Inc. All rights reserved. ComputingEssentials2012:ComputingEssentials2012:MakingITWorkforYouMakingITWorkforYou 8-6McGraw-Hill Secondary Storage DevicesSecondary Storage Devices • Provides permanent or nonvolatileProvides permanent or nonvolatile storagestorage • Data and programs can be retainedData and programs can be retained after the computer has been shut offafter the computer has been shut off • Most desktop microcomputer systemsMost desktop microcomputer systems have both hard and optical disk driveshave both hard and optical disk drives
  7. 7. Copyright © 2012 The McGraw-Hill Companies, Inc. All rights reserved. ComputingEssentials2012:ComputingEssentials2012:MakingITWorkforYouMakingITWorkforYou 8-7McGraw-Hill Hard DisksHard Disks • Use rigid, metallic platters for storageUse rigid, metallic platters for storage • Files organized usingFiles organized using trackstracks,, sectorssectors, and, and cylinderscylinders • Large capacity (terabytes)Large capacity (terabytes) • Sensitive instrumentsSensitive instruments • Two types of hard disks:Two types of hard disks: – Internal Hard DiskInternal Hard Disk – External Hard DisksExternal Hard Disks • Performance enhancementsPerformance enhancements
  8. 8. Copyright © 2012 The McGraw-Hill Companies, Inc. All rights reserved. ComputingEssentials2012:ComputingEssentials2012:MakingITWorkforYouMakingITWorkforYou 8-8McGraw-Hill Materials that Cause a Head CrashMaterials that Cause a Head Crash • AA head crashhead crash is a disaster for a hard disk,is a disaster for a hard disk, not to mention the data stored on the disknot to mention the data stored on the disk Return
  9. 9. Copyright © 2012 The McGraw-Hill Companies, Inc. All rights reserved. ComputingEssentials2012:ComputingEssentials2012:MakingITWorkforYouMakingITWorkforYou 8-9McGraw-Hill Internal Hard DiskInternal Hard Disk • Located inside system unit and oftenLocated inside system unit and often designated as the C: drivedesignated as the C: drive • Used to store programs and data filesUsed to store programs and data files • Advantages over removable mediaAdvantages over removable media – CapacityCapacity – Access speedAccess speed Return
  10. 10. Copyright © 2012 The McGraw-Hill Companies, Inc. All rights reserved. ComputingEssentials2012:ComputingEssentials2012:MakingITWorkforYouMakingITWorkforYou 8-10McGraw-Hill External Hard DisksExternal Hard Disks • Removable hard disksRemovable hard disks • Used to complement internal hard disk with anUsed to complement internal hard disk with an unlimited amount of additional storageunlimited amount of additional storage • Capacities extend into the terabytes (TBs)Capacities extend into the terabytes (TBs) Return
  11. 11. Copyright © 2012 The McGraw-Hill Companies, Inc. All rights reserved. ComputingEssentials2012:ComputingEssentials2012:MakingITWorkforYouMakingITWorkforYou 8-11McGraw-Hill Performance EnhancementsPerformance Enhancements • Disk cachingDisk caching to improveto improve hard disk performancehard disk performance • Redundant arrays ofRedundant arrays of inexpensive disks (RAID)inexpensive disks (RAID) to expand storage andto expand storage and to improve access speedto improve access speed • File compressionFile compression andand decompressiondecompression to increase capacityto increase capacity Return
  12. 12. Copyright © 2012 The McGraw-Hill Companies, Inc. All rights reserved. ComputingEssentials2012:ComputingEssentials2012:MakingITWorkforYouMakingITWorkforYou 8-12McGraw-Hill Optical DisksOptical Disks • Hold over 100 gigabytes (GB) of dataHold over 100 gigabytes (GB) of data • AttributesAttributes – LandsLands – PitsPits • Three typesThree types – Compact Disc (CD)Compact Disc (CD) – Digital Versatile Disc (DVD)Digital Versatile Disc (DVD) – Blu-Ray (Hi-Def) DiscBlu-Ray (Hi-Def) Disc
  13. 13. Copyright © 2012 The McGraw-Hill Companies, Inc. All rights reserved. ComputingEssentials2012:ComputingEssentials2012:MakingITWorkforYouMakingITWorkforYou 8-13McGraw-Hill Compact Disc (CDs)Compact Disc (CDs) • Optical formatOptical format • Capacity of 650 MB to 1 GBCapacity of 650 MB to 1 GB • Rotation speeds varyRotation speeds vary • Three basic typesThree basic types – Read only (Read only (CD-ROMCD-ROM)) – Write once (Write once (CD-RCD-R)) – Rewriteable (Rewriteable (CD-RWCD-RW)) Return
  14. 14. Copyright © 2012 The McGraw-Hill Companies, Inc. All rights reserved. ComputingEssentials2012:ComputingEssentials2012:MakingITWorkforYouMakingITWorkforYou 8-14McGraw-Hill Digital Versatile Discs (DVDs)Digital Versatile Discs (DVDs) • Like CDs, but newer format calledLike CDs, but newer format called digitaldigital versatile discversatile disc oror digital video disc (DVD)digital video disc (DVD) • Capacity of 4.7 GB to 17 GBCapacity of 4.7 GB to 17 GB • Three basic typesThree basic types – Read onlyRead only ((DVD-ROMDVD-ROM)) – Write onceWrite once ((DVD+RDVD+R andand DVD-RDVD-R)) – RewriteableRewriteable ((DVD+RWDVD+RW,, DVD-RWDVD-RW, and, and DVD-RAMDVD-RAM)) Return
  15. 15. Copyright © 2012 The McGraw-Hill Companies, Inc. All rights reserved. ComputingEssentials2012:ComputingEssentials2012:MakingITWorkforYouMakingITWorkforYou 8-15McGraw-Hill Blu-ray Disc (BDs)Blu-ray Disc (BDs) • Next generationNext generation optical discoptical disc for recordingfor recording high-definition (hi def) videohigh-definition (hi def) video • Capacity of 25 GB to 100 GBCapacity of 25 GB to 100 GB • Blu-ray optical drives are usually capable ofBlu-ray optical drives are usually capable of reading standard DVDs and CDs in additionreading standard DVDs and CDs in addition to Blu-ray discsto Blu-ray discs Return
  16. 16. Copyright © 2012 The McGraw-Hill Companies, Inc. All rights reserved. ComputingEssentials2012:ComputingEssentials2012:MakingITWorkforYouMakingITWorkforYou 8-16McGraw-Hill Solid-State StorageSolid-State Storage • Solid–state drives (SSDs)Solid–state drives (SSDs) – Faster and more durableFaster and more durable • Flash memory cardsFlash memory cards – Widely used in computers, cameras,Widely used in computers, cameras, and portable devices such as mobileand portable devices such as mobile phonesphones • USB DrivesUSB Drives (or(or Flash DrivesFlash Drives)) – Compact and easily transportedCompact and easily transported – Capacity of 1 GB to 256 GBCapacity of 1 GB to 256 GB
  17. 17. Copyright © 2012 The McGraw-Hill Companies, Inc. All rights reserved. ComputingEssentials2012:ComputingEssentials2012:MakingITWorkforYouMakingITWorkforYou 8-17McGraw-Hill Making IT Work for YouMaking IT Work for You Flash Camcorders, YouTube, and MySpaceFlash Camcorders, YouTube, and MySpace • Flash-based camcorders have made creatingFlash-based camcorders have made creating digital video simpler and more affordabledigital video simpler and more affordable • Easily upload your creations to photo- andEasily upload your creations to photo- and video-sharing Web sites on the Internetvideo-sharing Web sites on the Internet
  18. 18. Copyright © 2012 The McGraw-Hill Companies, Inc. All rights reserved. ComputingEssentials2012:ComputingEssentials2012:MakingITWorkforYouMakingITWorkforYou 8-18McGraw-Hill Cloud StorageCloud Storage • Cloud computingCloud computing is where the Internetis where the Internet acts as a “cloud” of serversacts as a “cloud” of servers – Applications provided as aApplications provided as a serviceservice rather than arather than a productproduct (for example,(for example, cloudcloud oror online storageonline storage)) • Cloud storage servicesCloud storage services make it easy tomake it easy to upload and shareupload and share files with anyonefiles with anyone
  19. 19. Copyright © 2012 The McGraw-Hill Companies, Inc. All rights reserved. ComputingEssentials2012:ComputingEssentials2012:MakingITWorkforYouMakingITWorkforYou 8-19McGraw-Hill Mass Storage DevicesMass Storage Devices • Organizations require tremendous amounts ofOrganizations require tremendous amounts of secondary storage calledsecondary storage called mass storagemass storage • Enterprise storage systems ensure data securityEnterprise storage systems ensure data security using specialized strategies and devices, such asusing specialized strategies and devices, such as – File serversFile servers – Networked attached storage (NAS)Networked attached storage (NAS) – RAID systemsRAID systems – Tape librariesTape libraries – Organizational cloud storageOrganizational cloud storage – Storage Area Network (SAN)Storage Area Network (SAN)
  20. 20. Copyright © 2012 The McGraw-Hill Companies, Inc. All rights reserved. ComputingEssentials2012:ComputingEssentials2012:MakingITWorkforYouMakingITWorkforYou 8-20McGraw-Hill Enterprise Storage SystemsEnterprise Storage Systems
  21. 21. Copyright © 2012 The McGraw-Hill Companies, Inc. All rights reserved. ComputingEssentials2012:ComputingEssentials2012:MakingITWorkforYouMakingITWorkforYou 8-21McGraw-Hill Careers In ITCareers In IT • Software engineersSoftware engineers analyze users’ needs andanalyze users’ needs and create application softwarecreate application software • General employer requirementsGeneral employer requirements – Bachelors degree inBachelors degree in computer sciencecomputer science – Extensive knowledge ofExtensive knowledge of computers and technologycomputers and technology – Communication and analytical skillsCommunication and analytical skills • Annual salary of $63,000 to $98,500Annual salary of $63,000 to $98,500
  22. 22. Copyright © 2012 The McGraw-Hill Companies, Inc. All rights reserved. ComputingEssentials2012:ComputingEssentials2012:MakingITWorkforYouMakingITWorkforYou 8-22McGraw-Hill A Look to the FutureA Look to the Future Your Entire Life Recorded on a Single DiskYour Entire Life Recorded on a Single Disk • Future secondary storage disks willFuture secondary storage disks will eventually store terabytes (TB) oreventually store terabytes (TB) or petabytes (PB)petabytes (PB) – Your entire life captured inYour entire life captured in digital video on a single discdigital video on a single disc – Currently developing programsCurrently developing programs that can scan photos and videosthat can scan photos and videos for a particular person’s facefor a particular person’s face
  23. 23. Copyright © 2012 The McGraw-Hill Companies, Inc. All rights reserved. ComputingEssentials2012:ComputingEssentials2012:MakingITWorkforYouMakingITWorkforYou 8-23McGraw-Hill Open-Ended Questions(Page 1 of 2)Open-Ended Questions(Page 1 of 2) • What are the two types of hard disks? DescribeWhat are the two types of hard disks? Describe three ways to improve hard disk performance.three ways to improve hard disk performance. • Compare solid-state and hard disk storage.Compare solid-state and hard disk storage. • List and compare the three most common opticalList and compare the three most common optical disc formats?disc formats?
  24. 24. Copyright © 2012 The McGraw-Hill Companies, Inc. All rights reserved. ComputingEssentials2012:ComputingEssentials2012:MakingITWorkforYouMakingITWorkforYou 8-24McGraw-Hill Open-Ended Questions (Page 2 of 2)Open-Ended Questions (Page 2 of 2) • Describe cloud computing and cloud storage.Describe cloud computing and cloud storage. • Discuss mass storage systems including enterpriseDiscuss mass storage systems including enterprise storage systems and storage area networks.storage systems and storage area networks.

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